foo.cc: In function 'int main()':
foo.cc:4:19: warning: unused variable 'max' [-Wunused-variable]
    4 |         int a,b,t,max,min,r;
      |                   ^~~
foo.cc:4:23: warning: unused variable 'min' [-Wunused-variable]
    4 |         int a,b,t,max,min,r;
      |                       ^~~
foo.cc:7:15: warning: 'r' is used uninitialized [-Wuninitialized]
    7 |         while(r)
      |               ^
foo.cc:4:27: note: 'r' was declared here
    4 |         int a,b,t,max,min,r;
      |                           ^

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